Means to prevent the unauthorized use of explosive-engines.



A. D. PERKINS.

MEANS TO PREVENT THEUNAUTHORIZED USE OF EXPLOSIVE ENGINES. APPLICATION FILED AUG. 25, 1913.

1,116,324. Patented Nov. 3, 1914.

2 SHEETS SHEET 1.

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{a 0'6 y Cg J A. D. PERKINS. MEANS TO PREVENT THE UNAUTHORIZED USE OF EXPLOSIVE ENGINES. APPLICATION FILED AUG. 25, 1913.

W1 TNESSE S IN V EN TOR.

. /wPmm/va -UN1TED STATES PATE T oiunon.

ALONSON D. PERKINS, OF SAN FRANCISCO, CALIFORNIA.

MEANS TO PREVENT THE UNAUTHOlRIZED USE OF EXPLOSIVE-ENGINES.

Specification of Letters Patent.

To all whom it may concern:

Be it known that I, ALoNsoN D. PERKINS, a citizen of the United States, residing at San Francisco, in the county of San Francisco and State of California, have invented a new and useful Means to Prevent the Un authorized Use of Explosion-Engines, of which the following isv a specification in such full and clear terms as will enable those skilled in'the art to construct and use the same.

This invention relates to a device for the purpose of preventing the unauthorized use of explosion engines, and an object thereof is to provide means whereby an unauthorized person attempting to operate an explosion engine such as is conmionly used in automobiles, etc., will set oil an alarm which he cannot stop, and at the same time out out the ignition system so that the engine cannot be further operated.

Another object of the invention is to provide means whereby the gasolene supply may be out off from the engine at the same time the alarm is set, thus adding an additional check to the operation of the motor.

A further object of the invention 18 to provide means whereby the alarm will be set off and the engine prevented from operating whether an attempt is made to start the engine on the magneto or the battery, it being common to provide engines with two systems of ignition, but which systems form no part of the present invention.

An embodiment of the invention is shown in the drawing in which the same reference numeral is applied .to the same portion throughout, but I am aware that there are many modifications thereof.

Figurel is a plan view of a portion of the frame of an automobile having ancxplosion engine mounted thereon to which is applied this alarm, Fig. 2 is a view looking toward the rear of the car of the switch for setting the alarm and the pitman for cutting off the gasoleue supply when the alarm is set, the gasolene valve being turned at 901degrees to the position it occupies in Fig. 1 for convenience of illustration, Fig. 3 is a View of the alarm setting lock looking toward the front of the car, Fig. 4 is a View of the alarm setting switch, the alarm relay and the alarm bell as they ap ear mounted on the front of the dashboard of the car, Fig. 5 is a view looking toward the end of the relay in the direction of the arrow on Fig. 4, the dash-board being shown in section, Fig. 6 is aview of the grounding device of the relay circuit for setting off the alarm when the engine shaft is turned off preparatory to startlng the car, and Fig. 7 is a diagrammatic view illustrating a common form of dual system wiring to which wiring this alarm system is applied.

The numeral 1 represents the side frames of an automobile, 2 the front axle, 3 the front wheels, 4 the'steering arms and 5 the link joining said arms together. The side frames are suitably connected together by means of cross braces 7 for the support of the engine 8, while immediately at the rear of the engine is the dash-board 9. The engine is of a common form having two sets of cylinders 10 and 11, the engine frame sup-. 'porting the usual fan 12 immediately at the rear of the radiator 13. Installed at one side of the engine isthe steering post 14: for the operation of directing the car, while installed at the other side of the engine is the magneto 15, said ma eto being driven in a well known manner rom the shaft 16 passing into the gear casin 17, which form of drive is well known in t e art.

Mounted upon the front of the dashboard is a bell 19, a relaybox 20 and the alarm setting lock 21, the latter extending through the dash-board in order to enable.

the user to apply his key thereto in locking and unlocking the same. The lock barrel is installed in a cylindrical shell 23 and isrotated by means of the handle 24, the key be ing inserted in the opening 25 to enable the lock barrel to be shifted from one position to another. It is contemplated that any form of lock and key may be used. At the Patented Nov. 3, 1914.

Application filed August 25, 1913. Serial No. 786,477.

front of the dash-board the lock barrel 22 is provided with a pin 25 and with a cam 26. The pin 25 has a pitman 27 pivoted thereto, which pitman in turn is connected to the stem 28 of the gasolene cut off valve 29, pipes 30 and 31 extending respectively to the gasolene supply tank and the carburetor. I The stem 28- passes through a suitable bracket 32 to cause it to move properly.

The alarm 19 consists of a common form of gong 33, hammer 34 and cover within which are installed the customary operating magnets.

The relay mounted upon the front of the. dash-board comprises a base plate 40 and rotated, said pin grounding said contact 68 tact 46 has a wire 61 extending to the bindsecured in place by means of screw brackets 41 and 42 is the box 20 within which is a double electromagnet 43. Pivoted above the magnet 43 is a suitable armature 44, which is held away from the magnet 43 by means of a suitable spring 45, said spring being connected with the base plate 40. Mounted at one end of the base plate 40 are three spring contacts 46, 47 and 48, said contacts being suitably insulated from each other and the base plate by means of fiber blocks 50 supporting them. Thecentral spring contact 47 has a projecting lip 51 which strikes a contact point 52 for a purpose to be described. On the lower part of the plate 40 is a fiber block 53 which block supports binding posts 54,55, 56 and 57.

he armature 44 carries a small fiber finger 60 which is adapted to bear on the inclined end 61 of the spring contact 46 to bring all of the contacts 46,- 47 and 48 together when the magnet 43 is energized, while at the same time the projection 51 is disconnected from the contact 52. The con- 1ng post 54, while from the binding post 54 a wire 62 extends to the magnet 43 and a wire 64 extends from the other side of said magnet to the binding post 57. Extending from the central spring contact 47 is a wire 65 extending to the binding. post 56, and extending from the outer spring contact 48 to the binding post 55 is a wire 66.

Secured on the lower portion of the dashboard in a place convenient to the crank shaft 67 is a spring contact plate 68, said plate being close enough to said shaft to be touched by the pin -69 when said shaft is and completin the alarm circuit as will be later explaine Fig. 7 illustrates diagrammatically a well known ignition system and magneto making use of two sets of spark plugs for the operation of the engine. In this diagram 15 indicates the magneto, 19 the alarm bell, 67 the shaft, 43 the relay magnets, 44 the relay armature, and 46, 47 and 48 the spring contacts.

The numeral 7 0 indicates the common switch for starting and stopping the operation of the ignition system, 71 indicates the spark coil, B a suitable battery, and 22 the device for setting the alarm.

Extending above the magneto are two sets of wires as lndicated to the first set of spark plugs and to the second set of spark plugs, while extending from the ma etc to the coil are the wires 80 and 81. A so connected with the magneto and coil are the high tension wires 82 and 83, while another high tension wire 84 extends from the terminal wire 82 to the top of the binding post on the breaker box 85. Extending from the binding post 86 is a high tension wire 87 which extends to the binding post 88 at the side of the breaker box, another wire 89 extending from there to the dash-switch 70, from which latter point a ground wire 90 extends to the frame.

It will be observed the high tension wires are all indicated with heavy lines while the low tension wires are otherwise shown.

The battery B has a ground wire 91 and a wire 92 leading to the coil 71, while from the central terminal of the coil a wire 93 leads to the contact point 52 and from there through the central spring contact 47 to the ground wire 47. Connected with the wire 92 a wire 94 which extends to one of the spring contacts adjacent the cam 26, while from the other spring contact adjacent the cam 26 a wire 95 extends to one of the binding posts of the alarm 19. From the other binding post of the alarm 19 a wire 96 extends to the spring contact 48.

Extending from one of the terminals of the magnet 43 is a wire 97 which is connected with the binding post at the s ring contact 68 adjacent the engine sha t 67, while extending from the other side of the magnet 43 is a wire 98, which is connected with the wire 95. Connected with the spring contact 46 is a wire 99 which extends to the high tension wire 82, and in order to maintain the wire pin 69 has left the spring contact 68 a wire 100 is provided, which wire is brought into contact with the spring contact 48 when the magnet is energized.

The operation of the a paratus is as follow.: It will be assume that the car has been stopped and the switch opened in the usual manner, whereupon the person operating the engine will remove his key from the look barrel 22, but in order to remove the key therefrom it is necessary to turn the same to the position indicated in Fig. 2 with the cam 26 making a connection between the wires 94 and 95, whereupon the alarm will be set and will cause the magnet 43 to become energized should a person turn the engine shaft 67 over without having the key to the lock barrel 22, no attempt being made to prevent the roper operation of the switch 70. Should the engine be turned over a circuit will be completed through the wire 91, battery B, wire 92, wire 94, wire 95, wire 98, magnets 43 and wire 97 to the ground, the engine shaft, thus energizing the magnet 43 and causing the armature 44 to be depressed whereupon the wire 96 will be grounded throu h the wire 47, the contact point 52 will fie removed from contact with the ground wire 47' and the three spring contacts will be brought together and in contact with the wire 100, so that circuits will then be complete independent of the movement of the engine shaft through the wire 91, battery B, wire 92, wire 94, wire 95, alarm 19, wire 96, spring contact 48,

97 grounded after the unease spring contactand wire 47 to the ground, as well as through the then formed shunt circuit including the wire 98, magnets 43, wire 97, wire 100 and contacts 48, 47 and wire 47 to the ground. The result of this will be that thebattery circuitwill be cut oil from the coil 71 by being broken at the point 52 so that the high tension side of the coil'will not deliver a sparkat the spark plugs, and in the same way because of the grounding of the wire 99 it will be impos sible for the magneto to make a circuit at the other side of the spark plugs and in addition the gasolene valve will at this same time be .closed, thus reducing the possible amount of gasolene which might by any contingency be used to that quantity actually in the carbureter.

It will be seen from the foregoing that whether an attempt is made to start the engine with the battery or with the magneto,

.: that mfeither event will the alarm be set off; and both ignition systems will be preconnect j vented from operating should the person attempting to operate the car fail to disthe wires 95' and 94: by the proper rotation of the cam 26.

' an explosion engine,

Having thusdescribed my invention what I-claim as new and desire to secure by Letters Patent of the United States, is as fol-' lows, modifications within the scope of the claims being expressly reserved:

1. Means for preventing the unauthorized use of explosion engines, comprising the combination with the ignition system of an explosion engine, of an alarm, manual means for setting said alarm, means to set oil said alarm thus set when the engine shaft is rotated, and means to prevent the operation of the ignition circuit only during the timesaid alarm is operating.

2. Means for preventing the unauthorized use of explosion engines, comprising the combination with the ignition system of of an alarm, manual means for setting said alarm, an electrical circuit for settin off said alarm thus set when the engine s aft is rotated, and means to prevent the operation of the ignition circuitsdurin'g the time the alarm is operat 1n a Means to prevent the unauthorized use of explosion engines, comprising the combination with the ignition system of an explosion engine, of an alarm, means for setting said alarm, electrical circuits for setting 011' said alarm thus set when the 'engine shaftis rotated, other electrical circuits to maintain said alarm in operation independent of the circuit closed by the engine shaft when the alarm has been set off, and

means tion circuits when the alarm is operating.

4. Means for preventing the unauthorized use of explosion engines,comprising the comto prevent the operation" of-the igni bination with the ignition system of an explosionengine, of an alarm, manual means for setting said alarm, means to-set off said alarm thus set when the engine shaft is rotated, means to prevent the operation of the ignition circuit only during the time said alarm is operating, a fuel supply pipe, and means to cut as" the fuel supply on the setting of' the alarm.-

5; Means for preventing the unauthorized use of explosion engines, comprising the combination with the ignition system of an explosion engine, of an alarm, manual means for setting said alarm, an electrical circuit for setting off said alarm thus set when the engine shaft is rotated, means to prevent the operation of the ignition circuits during the time the alarm is operating, a fuel supply pipe, and means tocut off the fuel supply on the setting of the alarm.

6. Means for preventing the unauthorized use of explosion engines, comprising the combination with the ignition system of an explosion engine, of an alarm, means for setting said alarm, electrical circuits for setting ofi the alarm thus set when the engine shaft is rotated, other electrical circuits to maintain said alarm in operation independent of the circuit closed by the engine shaft when the alarm has been set off, means to prevent the operation of the ignition circuits when the alarm is operating, supply pipe, and means to cut oil the fuel supply on the setting of the alarm.

Means for preventing the unauthorized use of explosion engines, comprising the combination with the ignition system of an explosion engine, including a battery and a magneto, of an alarm, manual means for setting said alarm, means to set 03 said alarm thus set when the engine shaft is rotated, and means to ground the magneto circuit and to break the battery circuit upon the setting. off of the alarm.

8. Means for preventing the unauthorized use of explosion engines, comprising the combination with the ignition system of an explosion engine, including a magneto and a battery, of an alarm, means for setting said alarm, an electrical circuit for setting off said alarm thus set when the engine shaft is rotated, a fuel supply pipe, means to cut as the fuel supply on the setting of the alarm, and means to ground the magneto circuit and to break the battery circuit upon the setting oil of said alarm.

9. Means for preventing the unauthorized use of explosion engines, comprising the combination with the i ition system of an explosion engine, including a battery and a magneto, of an alarm, a setting device, an electrical circuit extending to said setting device and adapted to be closed to set off the alarm thus set when the engine shaft is rotated, other electrical circuits to maintain said alarm in operation independent of the my hand this 16th day of August A. D. circuit closed by the engine shaft when the 1913, in the presence of two subscribedwitalarm is set off, and means to ground the nesses.

magneto circuit and to break the battery ALONSON D. PERKINS. 5 circ uit during the time said alarm is in op- Witnesses:

eration. C. P. GRIFFIN,

In testimony whereof I have hereunto set HENRY B. LISTER. 

